Causes of fetal breech presentation Fetal breech presentation refers to the situation in which the fetus\’ head is upward and the buttocks are downward. This abnormal fetal position will make childbirth more difficult and may even lead to dystocia. The exact cause of fetal breech presentation has not been found medically, but research shows that the following factors may be the main causes of fetal breech presentation. First of all, the size of the fetus is related to abnormal fetal position. If the fetus is larger or the space in the uterine cavity is smaller, the fetus is more likely to be in the breech position. That